.copy-feedback {
  position: fixed;
  top: 20px;
  right: 20px;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  z-index: 9999;
  transition: opacity 0.3s;
}

.copy-feedback.success {
  background: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #a5d6a7;
}

.copy-feedback.error {
  background: #ffebee;
  color: #c62828;
  border: 1px solid #ef9a9a;
}